Builder&#39;s safety, horse clamp



BUILDER'S SAFETY HORSE CLAMP Filed July 13, 1942 EMIL A WALSTROM Patented Sept. 28, 1943 essence J nmDnmssAFETYnonsnp i/[P Emil A. Walstrom, St. Louis-Park-Quinn., ass'ig-nor to Builders Safety Produota' lnc lstflliouisPark, Minn a eorporation of Minnesota l Application Jnly13, 19%;,Sbfial No. 50;822

6 Claims. (omen-) My inventionrelates to sa-builders safety -.horse clamp which is adapted to provideja rquick and easy method of making sawhorseslor low-staging for either temporary or permanent iset-ups.

My'horse clamp may be assembled vorknocked dcwn'irra few minutes. A feature resides in-providing a pair of sheet metal safety clamps which may be-used for each 'end of I the builders :sawhorse. With these clamps, sawhorses z-may-be made up for runways, mess tables, display stands,

or an other place where a strong, *rigid'iand quickly erected stage is needed.

A feature of my safety sawhorse clamp resides in providing a pairof strong plate-like members having reinforcing ribs projecting therefromwhich are adapted to receive wooden'two-byfours which may form the legs of the sawhorse and which plate members are adapted to be bolted together on either side of the tcp:of the two-by'r-fours to clamp the same. "Ihettopof'the plates are formed with slots which interconnect. The slot across the top of the iplates providesa wide shelf-like portion for receiving the two byfour or larger timber in a hat state,-=so as'toliorm a sawhorse with a fiat top. i

Furthermore, it is a'feature {of my inventionato provide clampmeans so that a builderis sawhorse maybemade up quickly, canubei readily ,disassem bled for storage, and wherethe horizontalbolt which connects the two plates .together may act as a stay-rod to connect with'a hook-ended'brace bolt forlocking the members :togethermhen itiis desired.

These features, together with other details and objects. will'be more fully and clearly hereinafter set forth as defined in the specification and claims.

In the drawing forming a part of this specification:

Figure 1 is a perspective detail of a portion of a builders sawhorse, showing one manner in which builders safety horse clamps may be used.

Figure 2 is a perspective view looking toward the inside of one of the plates of my horse clamp.

Figure 3 is a longitudinal sectional detail of the horse clamp as used in Figure 1.

Figure 4 is a section on the line 4-4 of Figure 3.

My builders safety horse clamp is made up of a pair of plates A which are made of metal, having a plate-like body portion I!) which is flat on one side and which is formed by stamping the plate out of said metal to form inwardly projecting side flanges ll.

The plates A are formed with an inner flange (2, portions of whicnextend parallel tome side ifianeesil I isoias to .form ,tWQTby-Iour or building imber .channe s 3- The .innerfien I has a ho'rizontal .p. ortion 1.3 ,connectingjtheiend P 3 or' wh ch ar arallel; to theside flan es l l ,.The transverse rib ,p rtion 1,3 acts-to reinforce the .plateiA, thereby providing a ,reinforcing means across the center ofeachgplate which strengthens the plate in a material manner.

- The top of each ,plate is forme duwitha recess or slot M which, is adaptedto. receive, a timberJIE in the manner illustrated in Figure 'Lwith the broadifiatiside-sof the timber. ext nd n horizontallyv and isthe bottom edge of the timber resting on the transverse shoulden'flangejm of the recess .iorislot I4. Llhus theshoulderjfiange it provides asubstantialshOuIder forthe timber [5 when positionedin the. safety clamps ,A as'illustrate d in .FiguresLandB. Vertical flanges H are formed 20.

tonythe yerticalsides of theislct l4 ,against which thesides of thetimber l5 engage.

..Each clampvA is provided with a hole for receiving a horizontally exte'ndingboltZl which elampsthemlates :A together against the ,side

edges ,of .the upper ends .of .the leg ;timbers,j22. The bolt .2 l,.may ,be of sufiicientjength as illustratedtin Figure 3, so thatthewooden timbers 22 whic hv;form the legs ,of vthe sawhorse may be either --iing,upon the length ,ofithe ,bolt 2!. ,A collar 23 may be v-,use.d ,0n the boltgZE v,when .the smaller ctimbersflziare used. y

itwo byy-fours, y-two-byy-sixes, two-bytwelyes; onanyothen suitable size timber, depend- .-;A primary feature ,of'lmy .safety horse clamp :resides in providing two simple, carfeful yedesigned reinforced plates A stamped from sheet metal, which are comparatively light in weight yet extremely strong and durable, and which are clamped together by the bolt 21, thereby providing a pair of plate brackets stamped from sheet metal which are adapted to be locked together on the upper end of the leg portions 22 to form a sectional'knocked-down assembly for sawho-rses and the like.

Each of the plates A is formed with short guiding or shoulder flanges I9 which extend parallel to the outer flanges H and act to guide and hold the upper ends of the leg timbers 22.

In using my builders horse clamps A, when it is desired a vertically extending brace bolt 24 may be used which is adapted to carry a right angular member 25 which in turn engages the bolt 2|. The other end of the bolt 2| is threaded and held in place by the nut 26 so that the cross timber l5 may be locked in place in the recesses M to rigidly connect and lock the timbers together. When the cross timber which extends longitudinally between the clamps A is held locked in place as illustrated in Figures 1, 3 and 4, the timber I5 holds the top of the legs 22 from sliding upward in the clamp plates A.

The leg timbers 22 are inserted in the timber channels: B, It is apparent that the timbers engaged in the timber channels B of the plates A may be rigidly clamped by the plates A by tightening the bolt 2|. It is also apparent that I provide a builder's safety horse clamp means for quickly and easily making up sawhorses or low staging either for temporary or permanent setups.

By this sectional clamping device the sawhorses' may be readily knocked down for storage, or built up in just a few minutes with standard timbers, such as two-by-fours, two-by-sixes, twoby-eights, etc., and thereby provides a strong,

safe horse clamp means forbuilding purposes which is of a very desirable nature.

' .In accordance with the patent statutes l have described the principles of operation of my builders safetyhorseclamp means, and while I have illustrated a particular form and design thereof,

thesame should be interpreted Within the scope of the following claims without departing from the spirit of my invention. I

I claim: I I 1.,Abuilders safetyhorse clamp means including a pair of metal plates, timber channels formed in the side of said plates, parallel reinforcing ribsadapted to form said channels in the I surface of said plates, transverse reinforcing ribs connecting the innerof said ribs, slots formed in the upper edge of s'aidplates adapted to form timber receiving recesses, a flanged shoulder at the base of said recessesfor the top timber to rest on, a hole extending through each of said lates, and an adjustable clamping bolt extending through said holes and adapted to clampthe timbers held in said'timber channels to lock said plates to said timbers, bolt and hook means extending downwardlyfrom the top timber engagingi'said adjustableclamping bolt to lock said top' timber to said clamp means, thereby forming a builders safety bracket means for sawhorses. 2. A plate adapted to provide one side of a clamp means for sawhorses for building construction, said plate including'timber channels I formed on the inner surface, thereof, notch arid shelf means-formed in the top of said plate adapted to receive a timber in a flat broadside position, said plate acting with a similar plate to clamp timbers together to form 'a-knockedplate members, adjustable bolt means for clampingsaid plate means together, timbers adapted to form the legs of the saw horse clamped between said plates by said bolt means, a longitudinally extending timber adapted to form the top of the sawhorse, recess shoulder means in said plates for receiving said top timber, and adjustable bolt means connecting with'said first adjustable bolt means and adapted to lock said top timber to said safety horse clamp means.

5. A builders' safety horse clamp means including a pair of sheet metal plates stamped from sheet metal, peripheral flanges projecting inwardly and formed on the side edges of said plates between which wood timbers are adapted to'be clamped to form legs projecting downward from said pair of clamps, a horizontal flange formed on each of said clamps'adapted to form a shoulder on which the top Wood timber is adapted to rest, bolt means connecting said pair of Y clamps, and bolt and hook means engaging said first bolt and extending vertically through the top timber to'clamp the same to said pair of clamps.

' 6. A pair of sheet metal sawhorse bracket plates, parallel flanges formed integral with said plates to provide guide and receiving channels for timbers adapted'to form the legs of a sawhorse,bolt means for connecting said plates to- "gether on either side of the upper ends of the timber legs, horizontal and vertical flanges formed integral with said plates adapted to provide resting and guiding shoulders for a longitudinal top timber of the sawhorse which connects with another'unit pair of said clamping 7 plates, bolt and hook means engaging said first bolland extending vertically through the top timber to clamp the same to said clamps, thereby "to provide a sawhorse of the desired height and length which is sectional and which may easily be set up or knocked down. i

EMIL A. WALSTROM. 

